Adding Three One-Digit Numbers (Sums up to 20)
To add three numbers, group any two numbers and find their sum. Then, add the third number to the sum obtained.
For example: Let’s calculate 1 + 2 + 4.
First, group 1 and 2 and find their sum.
1 + 2 + 4 = (1 + 2) + 4 = 3 + 4
Now, add the third number to the sum obtained.
3 + 4 = 7
So, 1 + 2 + 4 = 7.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.